class_docstr: Context manager to emulate os.name != 'posix' 
code: def __exit__(self, exc_type, exc_value, traceback):
      os.name = self._old_name
  
imports: import os
  import pytest
  import sys
  from tempfile import TemporaryFile
  from numpy.distutils import exec_command
  from numpy.distutils.exec_command import get_pythonexe
  from numpy.testing import tempdir, assert_, assert_warns, IS_WASM
  from io import StringIO
label_desc: Use image node_id 3 for calling the emulate_nonposix obj's underlying member method code with example usage: obj.__exit__(exc_type, exc_value, traceback) without return types